Combo: 4 PCS Tenergy Li-Ion 18650 Cylindrical 3.7V 2600mAh Flat Top Rechargeable Batteries w/ PCB

Features and Benefits
Unique and New! With PCB protection!
Li-Ion 18650 cylindrical rechargeable batteries with Internal Voltage protection PCB!
Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V.
Unique PCB design and patent pending.
3.7V 2600mAh high capacity
High energy density and lower weight than other rechargeable batteries
Manufactured under ISO9001-2000 to assure quality
Battery tested based on International Electrotechnical Commission (IEC) standard to ensure capacity, quality,and life time

Applications
Lighting or other device needs 3.7V power
Building portable power device that needs high energy density and low weight

Product Specifications
Capacity* Nominal 2600 mAh, Minimum 2450 mAh
Internal PCB protection prevents under-voltage at 2.5V and over-voltage at 4.25V. UNIQUE INTERNAL PCB!
Dimensions:
- Diameter 18+/-0.2 mm
- Height 66+/- 0.2mm
Weight (Typical) Approx. 46 g
Nominal Voltage: Average 3.7V
Cut-off Voltage: 3.0V
Internal Impedance: less or equal to 180 milliohm (with PTC)
Cycle Performance: 90% of initial capacity at 400 cycles
Cycle life: > 500 cycles
Charge: Current = 0.5C mA Voltage = 4.2 V End Current = 0.01 mA
Discharge: Current = 0.5C mA End Voltage = 3.0V
Max. Charging current: 1.5C ma
Max. Discharging current 1.5C ma (for continuous discharge)

Warning CAUTION: when working with Li-ion cells, they are very sensitive to charging characteristics and may explode if mis-handled. User should have enough knowledge on Li-Ion rechargeable batteries in charging, discharging, and assembly before use.